:root {
  --primary-color: #0071e3;
  --primary-hover: #0077ed;
  --secondary-color: #ff9900;
  /* Amazon Orange */
  --ebay-blue: #0064d2;
  --text-main: #1d1d1f;
  --text-secondary: #86868b;
  --bg-light: #f5f5f7;
  --bg-white: #ffffff;
  --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --section-padding: 80px 20px;
  --max-width: 1100px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-main);
  line-height: 1.5;
  background-color: var(--bg-white);
  overflow-x: hidden;
}

h1,
h2,
h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Header / Hero Section */
header {
  padding: 120px 20px 80px;
  text-align: center;
  background: radial-gradient(circle at top right, #f0f7ff, transparent),
    radial-gradient(circle at bottom left, #fff9f0, transparent);
}

header h1 {
  font-size: 3.5rem;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--ebay-blue), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  max-width: 600px;
  margin: 0 auto 40px;
  font-size: 1.25rem;
}

.cta-button {
  display: inline-block;
  padding: 16px 32px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 980px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  background-color: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
}

.hero-subtext {
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Section Styling */
section {
  padding: var(--section-padding);
}

section h2 {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: 48px;
}

/* Problem Section */
#problem {
  background-color: var(--bg-light);
  border-radius: 40px;
  margin: 0 20px;
}

#problem .content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.problem-list {
  list-style: none;
}

.problem-list li {
  margin-bottom: 16px;
  padding-left: 32px;
  position: relative;
  color: var(--text-main);
  font-weight: 500;
}

.problem-list li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: #ff3b30;
  font-weight: bold;
}

/* Solution Section */
#solution {
  text-align: center;
}

#solution p {
  max-width: 800px;
  margin: 0 auto 24px;
}

/* How It Works Section */
#how-it-works {
  background-color: var(--bg-white);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  padding: 40px;
  background: var(--bg-white);
  border-radius: 24px;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-10px);
}

.step-card h3 {
  margin-bottom: 16px;
  color: var(--primary-color);
}

.step-number {
  font-size: 3rem;
  font-weight: 800;
  opacity: 0.1;
  margin-bottom: -20px;
}

/* Benefits Section */
#benefits {
  background-color: var(--text-main);
  color: white;
  border-radius: 40px 40px 0 0;
}

#benefits h2 {
  color: white;
}

#benefits ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
}

#benefits li {
  padding: 20px;
  background: pink;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 2.5rem;
  }

  #problem .content-grid,
  .step-grid,
  #benefits ul {
    grid-template-columns: 1fr;
  }

  section {
    padding: 60px 20px;
  }
}